| Name ▲ | Age | Gender | Owner | Actions |
|---|---|---|---|---|
| On A Starry Night | 1 | Filly | Generous Bloodstock | View |
| On The Podium | 1 | Filly | Gintara Lodge | View |
| On The Tide | 1 | Colt | Gintara Lodge | View |
| One And Only | 1 | Filly | Hidden Oak Farm | View |
| One Lucky Fool | 1 | Colt | Tall Oaks Farm | View |
| OneWithTheCrowd | 1 | Colt | Black Briar Stables | View |
| Only You | 1 | Filly | Black Storm West | View |
| Opening Scenes | 1 | Colt | Tall Oaks Farm | View |
| Opulent Versailles | 1 | Filly | Black Briar Stables | View |
| Opéra Garnier | 1 | Colt | Black Briar Stables | View |
| Orapa | 1 | Colt | Generous Bloodstock | View |
| Organism | 1 | Colt | Gintara Lodge | View |
| Otherworld Rebel | 1 | Filly | Starfish Stables | View |
| Our Cinderella | 1 | Filly | Black Storm West | View |
| Pagan | 1 | Filly | Dreadnought | View |
| Pagbilao | 1 | Colt | Gintara Lodge | View |
| Painted Disguise | 1 | Colt | Stillwater Farms | View |
| Painted Princess | 1 | Filly | Stillwater Farms | View |
| Painted in Blood | 1 | Colt | Starfish Stables | View |
| Palantír | 1 | Filly | Gotapa Racing | View |